Rising medical costs, “combined with the costs associated with the Affordable Care Act, have made it increasingly difficult to continue providing the same level of health care benefits to our employees at an affordable cost,” UPS said in a memo to employees.

According to Kaiser, UPS (NYSE: UPS) told white-collar workers two months ago that 15,000 working spouses eligible for coverage by their own employers would be excluded from the UPS plan in 2014.

UPS expects the move, which applies to non-union U.S. workers only, to save about $60 million a year, company spokesman Andy McGowan said.

The health law requires large employers to cover employees and dependent children, but not spouses or domestic partners, Kaiser adds.